Touch Display Panel with Multiplexer in Bending Area

1. A touch display panel, comprising: a display area comprising a plurality of first touch electrodes and a plurality of second touch electrodes; and a peripheral area located around the display area, wherein the peripheral area comprises: first touch lines electrically connected with at least one of the plurality of first touch electrodes; second touch lines electrically connected with at least one of the plurality of second touch electrodes; an external circuit interface configured to provide an electrical connection between the touch display panel and an external circuit; and a first multiplexer, which is electrically connected at an output port thereof with at least one of the first touch lines or the second touch lines and electrically connected at an input port thereof with the external circuit interface, wherein the input port of the first multiplexer comprises a plurality of input channels, the output port of the first multiplexer comprises a plurality of output channels, and the first multiplexer further comprises a plurality of multiplexing assemblies arranged in parallel, and each of the plurality of multiplexing assemblies comprises: a main routing line electrically connected with a respective one of the plurality of input channels; a first branch line and a second branch line, which are electrically connected with two respective output channels of the plurality of output channels, respectively; a first control signal line configured to provide a first control signal controlling the first branch line to switch between a connection with the main routing line and a disconnection from the main routing line; and a second control signal line configured to provide a second control signal controlling the second branch line to switch between a connection with the main routing line and a disconnection from the main routing line, wherein the touch display panel further comprises a base substrate, and each of the plurality of multiplexing assemblies comprises: an active layer on the base substrate; a first insulating layer on a side of the active layer facing away from the base substrate; a first electrically conductive layer on a side of the first insulating layer facing away from the base substrate; a second insulating layer on a side of the first electrically conductive layer facing away from the base substrate; and a second electrically conductive layer on a side of the second insulating layer facing away from the base substrate, and wherein the first control signal line and the second control signal line are routed in the first electrically conductive layer, and the main routing line and the first branch line as well as the second branch line are routed in the second electrically conductive layer and are connected with the active layer via an electrically conductive penetration portion, which penetrates the first insulating layer and the second insulating layer.

2. The touch display panel according to claim 1 , wherein the first touch lines and the second touch lines are electrically connected to the output port of the first multiplexer.

3. The touch display panel according to claim 2 , wherein the peripheral area further comprises a bending area, and the first multiplexer is located on a side of the bending area distal to the external circuit interface.

4. The touch display panel according to claim 1 , further comprising a second multiplexer, which is electrically connected at an output port thereof with the second touch lines and electrically connected at an input port thereof with the external circuit interface, wherein the first multiplexer is electrically connected at its own output port with the first touch lines, and wherein respective input ports of the first multiplexer and the second multiplexer are electrically connected with different channels of the external circuit interface, respectively.

5. The touch display panel according to claim 4 , wherein the peripheral area further comprises a bending area, and the first multiplexer and the second multiplexer are located between the bending area and the external circuit interface.

6. The touch display panel according to claim 1 , wherein the first multiplexer further comprises a plurality of branches, which extend from a same one of the plurality of input channels to different ones of the plurality of output channels respectively, and wherein each of the plurality of branches is provided with a control switch.

7. The touch display panel according to claim 6 , further comprising a control circuit which is configured to provide the control switch with a control signal.

8. The touch display panel according to claim 1 , wherein one of the plurality of first touch electrodes or the plurality of second touch electrodes are driving electrodes and the other of the plurality of first touch electrodes or the plurality of second touch electrodes are sensing electrodes, and the driving electrodes and the sensing electrodes are alternately distributed.

9. The touch display panel according to claim 1 , wherein, in each of the plurality of multiplexing assemblies, an orthographic projection of the main routing line on the base substrate is located between an orthographic projection of the first branch line on the base substrate and an orthographic projection of the second branch line on the base substrate.

10. The touch display panel according to claim 9 , wherein, in each of the plurality of multiplexing assemblies, an orthographic projection of the first control signal line on the base substrate is located between the orthographic projection of the first branch line on the base substrate and the orthographic projection of the main routing line on the base substrate, and an orthographic projection of the second control signal line on the base substrate is located between the orthographic projection of the second branch line on the base substrate and the orthographic projection of the main routing line on the base substrate.

11. The touch display panel according to claim 10 , wherein the orthographic projection of each of the main routing line, the first control signal line and the first branch line on the base substrate at least partially overlaps with an orthographic projection of the active layer on the base substrate, and wherein the orthographic projection of each of the main routing line, the second control signal line and the second branch line on the base substrate at least partially overlaps with the orthographic projection of the active layer on the base substrate.

12. The touch display panel according to claim 1 , wherein the second electrically conductive layer is also provided therein with: a first signal transmission line, which is electrically connected with the first control signal line in each of the plurality of multiplexing assemblies, via the electrically conductive penetration portion which penetrates the second insulating layer; and a second signal transmission line, which is electrically connected with the second control signal line in each of the plurality of multiplexing assemblies, via the electrically conductive penetration portion which penetrates the second insulating layer.

13. The touch display panel according to claim 1 , further comprising: a third electrically conductive layer, which is located on the side of the second insulating layer facing away from the base substrate and on a side of the second electrically conductive layer facing towards the base substrate; and a fourth insulating layer, which is located on a side of the third electrically conductive layer distal to the base substrate and on a side of the third insulating layer facing towards the base substrate, wherein the third electrically conductive layer is provided with an input terminal which is electrically connected with the main routing line via a through-hole structure which passes through the fourth insulating layer.

14. An electronic apparatus, comprising the touch display panel according to claim 1 .

15. The electronic apparatus according to claim 14 , wherein the first touch lines and the second touch lines are electrically connected to the output port of the first multiplexer.

16. The electronic apparatus according to claim 15 , wherein the peripheral area further comprises a bending area, and the first multiplexer is located on a side of the bending area distal to the external circuit interface.

17. The electronic apparatus according to claim 14 , wherein the touch display panel further comprises a second multiplexer, which is electrically connected at an output port thereof with the second touch lines and electrically connected at an input port thereof with the external circuit interface, wherein the first multiplexer is electrically connected at its own output port with the first touch lines, and wherein respective input ports of the first multiplexer and the second multiplexer are electrically connected with different channels of the external circuit interface, respectively.

18. The electronic apparatus according to claim 17 , wherein the peripheral area further comprises a bending area, and the first multiplexer and the second multiplexer are located between the bending area and the external circuit interface.